How to convert acres to square miles
One acre is 0.0015625 square miles. To convert acres to square miles, divide the number of acres by 640.
Square miles = acres ÷ 640
For example, 2 acres is 0.003125 square miles.
Acres to square miles conversion table
| Acres | Square miles |
|---|---|
| 0.25 | 0.000390625 |
| 0.5 | 0.00078125 |
| 1 | 0.0015625 |
| 2 | 0.003125 |
| 5 | 0.0078125 |
| 10 | 0.015625 |
| 100 | 0.15625 |
About these units
The acre is the standard unit for land in the United States. It equals 43,560 square feet.
Square miles measure cities, counties and large tracts of land. One square mile is 640 acres.
Frequently asked questions
How many square miles are in one acre?
One acre is 0.0015625 square miles.
How many acres are in one square mile?
One square mile is 640 acres. Use the square miles to acres converter to go the other way.
Can I convert to other area units?
Yes. The area converter converts between square feet, square meters, square yards, acres, hectares, square miles and square kilometers.